Remarkable people the Danes, they managed to get nearly all their Jewish population safely to Sweden while under German occupation :-
https://en.wikipedia.org/wiki/Rescue_of_the_Danish_Jews
The Graves do not appear to be marked by CWGC plaques, they did use bronze ones but in a different form (my own Dad's grave is so marked), so would appear to be local. There are more such plaques than for this crew alone, are they all for Allied Airmen I wonder? The care and reverence bestowed on them is palpable and the annual commemoration must be a very moving occasion. Such plots can be found in so many of the occupied nations of Western Europe and the pride and gratitude of those who tend them span the generations. In remembering our fallen they remember their own suffering in those bleak years of occupation and the joy of their liberation. Their example humbles us and reminds us that governments may come and go but true friendship comes from individuals, no matter their nationality.